Before I left Reddit, I used a plugin through the api to replace all of my comments with random gibberish and then delete them. Part of this was because (mandatory) fuck spez. But more importantly, it was to protect the anonymity of my account. After years of posting, there is likely enough personal information shared to potentially connect my Reddit habits to my online identity. I wasn’t planning on using Reddit again in the future on that account, but I left it open in order to maintain some security control over the account. I’m not really sure what to do at this point because I still consider it a security vector that’s a bit concerning. There’s no way I can manually edit and delete all of my content with the snail’s-pace reddit UI, and I have no ability to assure that my content will remain unavailable or at least not publicly displayed.
Are you a resident of the EU? If so, I believe you have the legal right to demand that reddit delete all of your data and user content, and by law they must comply.
If you are a US citizen, I believe you have very little recourse in forcing them to delete your data, unless you are a resident of California or Virginia.
I wonder what the legality of transferring ownership of the account to someone in the EU in order to request gdpr enforcement would be… Or I suppose you could become an EU resident but that would be rather difficult.
Most likely you could just hit it from a proxy and say you are from the EU.